Sand filters with volcanic gravel are used to provide minerals to irrigation water in a natural and sustainable way. This gravel is rich in minerals such as iron, magnesium, calcium, potassium and other trace elements that are beneficial for plant growth.
Irrigation water passes through a bed of sand and gravel, which acts as a filter medium to remove impurities and sediment. As the water flows through the gravel, the minerals present in it slowly dissolve into the water and are released into the soil during irrigation. This provides a constant source of nutrients and trace elements for the plants.
Volcanic gravel is especially useful for agriculture on mineral-deficient soils due to its ability to slowly release nutrients and maintain a constant concentration in irrigation water. In addition, this material is strong and durable, meaning it can be reused multiple times before needing to be replaced.
